Telephone headset amplifier unit



FIG. 1 is a perspective view of the present invention;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof, showing a telephone positioned on the upwardly facing surface thereof. The telephone is shown in phantom for illustrative purposes only and does not form a part of the claimed design. 

The ornamental design for telephone headset amplifier unit, as shown and described. 